| Identification | More | [Name]
1-Naphthol-4-sulfonic acid | [CAS]
84-87-7 | [Synonyms]
1-NAPHTHOL-4-SULFONIC ACID
4-Hydroxy-1-naphthalenesulfonic acid
N-(M-SULFOPHENYL) GAMMA ACID
1-Naphthalenesulfonicacid,4-hydroxy-
4-hydroxy-1-naphthalenesulfonicaci
4-hydroxynaphthalene-1-sulphonicacid
Nevileandwinther’sacid
Nevile-Winthers acid
Meville-winter acid(1-naphthol-4-sulfonic acid,NW-acid)
4-hydroxynaphthalene-1-sulfonic acid
NEVILLE-WINTHER ACID (NA SALT)
1-Hydroxy-4-sulfonaphthalene
HIGH-PURITY N.W. ACID
1-Hydroxy-4-naphthalenesulfonic acid
Neville acid
Neville and winther acid
1,4-Oxy Acid
a-Naphthol-4-sulfonic acid
Nevile-Winther acid | [EINECS(EC#)]
201-568-4 | [Molecular Formula]
C10H8O4S | [MDL Number]
MFCD00065324 | [Molecular Weight]
224.23 | [MOL File]
84-87-7.mol |
| Chemical Properties | Back Directory | [Melting point ]
170℃ | [Boiling point ]
335.63°C (rough estimate) | [density ]
1.4643 (rough estimate) | [refractive index ]
1.7040 (estimate) | [storage temp. ]
2-8°C, stored under nitrogen, away from moisture | [form ]
solid | [pka]
0.73±0.40(Predicted) | [color ]
white to yellow | [InChI]
InChI=1S/C10H8O4S/c11-9-5-6-10(15(12,13)14)8-4-2-1-3-7(8)9/h1-6,11H,(H,12,13,14) | [InChIKey]
HGWQOFDAUWCQDA-UHFFFAOYSA-N | [SMILES]
C1(S(O)(=O)=O)=C2C(C=CC=C2)=C(O)C=C1 | [CAS DataBase Reference]
84-87-7(CAS DataBase Reference) | [EPA Substance Registry System]
84-87-7(EPA Substance) |
| Raw materials And Preparation Products | Back Directory | [Raw materials]
Sodium bisulfite-->Naphthionic acid | [Preparation Products]
disodium 3-[[4'-[(6-amino-1-hydroxy-3-sulphonato-2-naphthyl)azo]-3,3'-dimethoxy[1,1'-biphenyl]-4-yl]azo]-4-hydroxynaphthalene-1-sulphonate-->C.I. 14720-->Direct Blue 151-->disodium 3-[[4'-[[6-amino-1-hydroxy-3-sulphonato-2-naphthyl]azo]-3,3'-dimethoxy[1,1'-biphenyl]-4-yl]azo]-4-hydroxynaphthalene-1-sulphonate-->sodium 3-[[4-(benzoylethylamino)-2-methylphenyl]azo]-4-hydroxynaphthalene-1-sulphonate-->sodium 4-hydroxy-3-[[3-(phenylsulphamoyl)-p-tolyl]azo]naphthalenesulphonate-->3-[(5-Chloro-2-hydroxy-3-sulfophenyl)azo]-4-hydroxy-1-naphthalenesulfonic acid disodium salt-->5-Amino-4-hydroxy-3-[[4'-[(1-hydroxy-4-sulfonaphthalen-2-yl)azo]-3,3'-dimethyl[1,1'-biphenyl]-4-yl]azo]-2,7-naphthalenedisulfonic acid trisodium salt-->Acid Red 374-->4,4'-[(2-Methyl-5-sodiosulfo-1,3-phenylene)bis[azo(4,6-diamino-3,1-phenylene)azo]]bis[naphthalene-1-sulfonic acid sodium] salt-->Benzoazurine-->Brilliant purpurin R-->Thiazine red-->Acid Violet 131-->Naphthalene scarlet B-->Aluminium, 7-hydroxy-8-[(4-sulfo-1-naphthalenyl)azo]-1,3-naphthalenedisulfonic acid complex-->Mordant Violet 2-->DIRECTVIOLET32-->disodium (3Z)-3-[[4-(4-anilino-3-sulfonato-phenyl)diazenylnaphthalen-1-yl]hydrazinylidene]-4-oxo-naphthalene-1-sulfonate-->3-[[2-[(N-Ethyl-N-phenylamino)sulfonyl]phenyl]azo]-4-hydroxy-1-naphthalenesulfonic acid sodium salt-->6-Amino-4-hydroxy-5-[[4'-[(1-hydroxy-4-sodiosulfo-2-naphthalenyl)azo]-1,1'-biphenyl-4-yl]azo]naphthalene-2-sulfonic acid sodium salt-->Oxamine blue 4r |
| Hazard Information | Back Directory | [Chemical Properties]
White to Yellow Solid | [Uses]
1-Naphthol-4-sulfonic acid is used as an intermediate of azo dyes to prepare dyes such as direct copper blue BR and 2R, direct violet RB, acid red B and acid medium jujube red B | [Preparation]
After drying under vacuum, the resulting filter cake contains 1-naphthol-4-sulphonic acid in a yield of 92% of theory and <0.5% 1-naphthol-2-sulphonic acid and 3% of 1-naphthol-2,4-disulphonic acid based on the weight of 1-naphthol-4-sulphonic acid.
| [Synthesis]
1-Naphthol-4-sulfonic acid was synthesized by addition, hydrolysis and acid precipitation of sodium 1,4-aminonaphthalene sulfonate. |
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